Information on GNC in Baltimore, MD 21227 Outlet Note Regular Brands GNC Maryland Baltimore 325349 Rating 4.7 based on 97 votes Address 1400 Sulphur Spring Road Baltimore, MD 21227 Phone Hours may vary in different stores. For accurate hours, please contact each store directly. Suite643 Hours may vary in different stores. For accurate hours, please contact each store directly. Nearby GNC Outlet GNC Outlet - Baltimore GNC Outlet - Baltimore GNC Outlet - Baltimore GNC Outlet - Baltimore People Also Viewed